115 lines
2.8 KiB
Go
115 lines
2.8 KiB
Go
package aws
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import (
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"log"
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"regexp"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/elb"
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"github.com/hashicorp/terraform/helper/schema"
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)
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// setTags is a helper to set the tags for a resource. It expects the
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// tags field to be named "tags"
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func setTagsELB(conn *elb.ELB, d *schema.ResourceData) error {
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if d.HasChange("tags") {
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oraw, nraw := d.GetChange("tags")
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o := oraw.(map[string]interface{})
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n := nraw.(map[string]interface{})
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create, remove := diffTagsELB(tagsFromMapELB(o), tagsFromMapELB(n))
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// Set tags
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if len(remove) > 0 {
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log.Printf("[DEBUG] Removing tags: %#v", remove)
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k := make([]*elb.TagKeyOnly, 0, len(remove))
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for _, t := range remove {
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k = append(k, &elb.TagKeyOnly{Key: t.Key})
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}
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_, err := conn.RemoveTags(&elb.RemoveTagsInput{
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LoadBalancerNames: []*string{aws.String(d.Get("name").(string))},
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Tags: k,
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})
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if err != nil {
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return err
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}
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}
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if len(create) > 0 {
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log.Printf("[DEBUG] Creating tags: %#v", create)
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_, err := conn.AddTags(&elb.AddTagsInput{
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LoadBalancerNames: []*string{aws.String(d.Get("name").(string))},
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Tags: create,
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})
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// diffTags takes our tags locally and the ones remotely and returns
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// the set of tags that must be created, and the set of tags that must
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// be destroyed.
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func diffTagsELB(oldTags, newTags []*elb.Tag) ([]*elb.Tag, []*elb.Tag) {
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// First, we're creating everything we have
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create := make(map[string]interface{})
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for _, t := range newTags {
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create[*t.Key] = *t.Value
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}
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// Build the list of what to remove
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var remove []*elb.Tag
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for _, t := range oldTags {
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old, ok := create[*t.Key]
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if !ok || old != *t.Value {
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// Delete it!
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remove = append(remove, t)
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}
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}
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return tagsFromMapELB(create), remove
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}
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// tagsFromMap returns the tags for the given map of data.
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func tagsFromMapELB(m map[string]interface{}) []*elb.Tag {
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var result []*elb.Tag
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for k, v := range m {
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t := &elb.Tag{
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Key: aws.String(k),
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Value: aws.String(v.(string)),
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}
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if !tagIgnoredELB(t) {
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result = append(result, t)
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}
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}
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return result
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}
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// tagsToMap turns the list of tags into a map.
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func tagsToMapELB(ts []*elb.Tag) map[string]string {
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result := make(map[string]string)
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for _, t := range ts {
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if !tagIgnoredELB(t) {
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result[*t.Key] = *t.Value
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}
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}
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return result
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}
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// compare a tag against a list of strings and checks if it should
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// be ignored or not
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func tagIgnoredELB(t *elb.Tag) bool {
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filter := []string{"^aws:"}
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for _, v := range filter {
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log.Printf("[DEBUG] Matching %v with %v\n", v, *t.Key)
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if r, _ := regexp.MatchString(v, *t.Key); r == true {
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log.Printf("[DEBUG] Found AWS specific tag %s (val: %s), ignoring.\n", *t.Key, *t.Value)
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return true
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}
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}
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return false
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}
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